Learn about this topic in these articles:

major reference

Cervical levels C
1–C
4 are the main contributors to the group of nerves called the
cervical plexus; in addition, small branches of the plexus link C
1 and C
2 with the vagus nerve, C
1 and C
2 with the hypoglossal nerve, and C
2–C
4 with the accessory nerve. Sensory branches of the
cervical plexus are...